3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 GENERAL DESCRIPTION The GT810h supports UMTS-850(Band V), UMTS-1900(Band I), UMTS-2100(Band I), GSM-850, GSM-900, GSM-1800, and GSM-1900 based GSM/GPRS/EDGE/UMTS. All receivers and the UMTS transmitter use the radioOne1Zero-IF architecture to eliminate intermediate frequencies, directly converting signals between RF and baseband.
3. TECHNICAL BRIEF A generic, high-level functional block diagram of GT810h is shown in Figure 1-1. One antenna collects base station forward link signals and radiates handset reverse link signals. The antenna connects with receive and transmit paths through a D5015(FEM, Front End Module). The UMTS receive paths each include an LNA, an RF band-pass filter, and a downconverter that translate the signal directly from RF- to-baseband using radioOne ZIF techniques.
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3. TECHNICAL BRIEF 3.12.4 Touch Interface In GT810h, 4-wire touch screen panel is used for user input method. Two resistive layers make up a 4- wire touch screen panel and are separated by insulating dots. The inside surface of each layer is coated with a transparent metal oxide coating that generates a gradient across each layer when voltage is applied.
3. TECHNICAL BRIEF 3.14 Camera interface GT810h has one cameras : 3M Pixel CMOS Camera Below figures shows the camera board to board connector and camera I/F signal. 3.14.1 3Mega Camera Interface ICVE10184E070R100FR ICVE10184E070R100FR CAM_DATA[4] INOUT_A1 INOUT_B1 FLT_CAM_DATA[4] CAM_DATA[0] INOUT_A1...
4.9 USB trouble USB Initial sequence of GT810h is : USB connected to GT810h → VCHG_VBUS(R409) go to 5V → USBH_SEL go to 0V(U404 Pin#10) → USBH_CS go to 1.8V (R403) → USBH_DM go to 3.3V (U404 Pin#7) → USB_DATA is triggered → USB work...
Additionally, LGMDP allows multi downloading up to 16 handsets at the same time. • GT810h does NOT use LG USB driver but LG SP USB driver. LG SP USB driver is used for only smart phone which is based on Windows Mobile OS.